Prep for Big Bang in GMS

Ah, but KMS knows that their content will eventually be exported to GMS, so they may have coded the changes with that in-mind in order to facilitate a transfer.

I wouldn't hold my breath. Seriously, don't expect it to be quick. Though other things, like Dual Blade and the Chaos bosses, are being ported into GMS very quickly, those are only minor changes compared to what an entire game changing patch is.